package sht.commons;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import sht.model.User;

@WebFilter("/LoginFilter")
public class LoginFilter implements Filter {
    public LoginFilter() {
    }
	public void destroy() {
	}
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		HttpServletRequest hrq = ((HttpServletRequest)request);
		HttpServletResponse hrp = ((HttpServletResponse)response);
		
		String uri = hrq.getRequestURI();
		User user = (User) hrq.getSession().getAttribute(Constant.SESSION_USER);
		if(user != null){
			chain.doFilter(request, response);
		}else if(!uri.contains("login.do")){
			hrq.getRequestDispatcher("/index.jsp").forward(hrq, hrp);
		}else{
			chain.doFilter(request, response);
		}
	}

	public void init(FilterConfig fConfig) throws ServletException {
		
	}

}
